Hitchcock cameos

While talking about The Lodger (1927), Truffaut raises the question of "personal appearances" and asks Hitchcock why he made them. Hitchcock answers:

"It was strictly utilitarian; we had to fill the screen. Later on it became a superstition and eventually a gag. But by now it's a rather troublesome gag, and I'm very careful to show up in the first five minutes so as to let the people look at the rest of the movie with no further distraction."

My favourite cameo, from North by Northwest. Alfred Hitchcock tries to catch a buson Madison Avenue between 44th Street and 45th Street. Long before he ever went to the USA, Hitchcock's hobby was the study of Manhattan. He'd memorised every train timetable, as well as the location of all the major stores.

There are numerous lists of those personal appearances around. Some have him appearing in 36 films, most have 37, some (Wikipedia) have 40. The disputed films include Number 17, The Man Who Knew Too Much, Sabotage and Rebecca. (Why people argue over the Rebecca entry mystifies me, as the Hitchcock|Truffaut book contains a large photo of the moment. The earlier films have the problem of blurry B&W.) Here's my list:

The Lodger (1927) -
At a desk in a newsroom and later in the crowd watching an arrest.